{
  "manageEntity": {
    "action": "Save",
    "entityId": "999732105",
    "entityType": "Track",
    "nonce": "0xc6cf059a5d331adc9900a4197b1e3ef2c6bec4af3497bc0e18c7d4843078f6ce",
    "signature": "0xc56cfbd9d74792fabe4d694b3d67f65b391c98b629a313c0d47ed1ebadc8fa305345d68ce03bf3ccb81127d330b40ef2b959f2aaeb340cc55a3e3dcb2790b6321b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}